JP2017079879A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair capable of reliably supporting a load with a simple structure and effectively enabling nesting without dependence on leg members.SOLUTION: A chair capable of being nested on the front and rear sides by flipping up a seat 1 is configured such that right-and-left rearward legs 2 extending rear-downward are arranged inside right-and-left frontward legs 3 extending front-downward, and the rearward legs 2 and the frontward legs 3 are connected in the width direction so as to cross with each other in the middle, so that the rearward legs 2 and the frontward legs 3 form a fixed angle at least when in use.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a chair having a simple structure and capable of effectively realizing nesting regardless of leg materials.

  Conventionally, in order to store a compact chair when not in use, it is a type that can be folded flat like a pipe chair, or because it cannot be folded due to its function, appearance, material, etc. In other words, a so-called nesting type that overlaps in front and rear is known.

  Of these, examples of chairs that can be nested include those shown in Patent Document 1.

  This chair is configured to be able to nest back and forth by flipping up the seat.

JP2015-134124A

  However, this is constituted by twisting a single leg member between left and right rearward legs extending rearward and downward and left and right forward legs extending forwardly and downwardly. For this reason, there exists a problem that a leg material is limited to metal pipe frames.

  On the other hand, it is conceivable that the rearward legs and the forward legs are overlapped and connected in the width direction. However, as in the cited reference 1, the rearward legs are arranged outside the forward legs, and the left and right rearward legs are near the intersection. If a strength member (back support member) is installed between them, the rearward and forward legs of another chair brought closer from the back during nesting interfere with the strength member, so that the stack pitch is limited.

  Also, if the seat rotation shaft and seat support are placed at the boundary between the forward and rearward legs, the torque arm will be shortened, making it easier for high loads to act on the seat support, which is necessary at the boundary between the forward and rearward legs. There is also a problem that higher rigidity has to be provided.

  An object of the present invention is to provide a chair that solves the above-described problems, can reliably support a load even with a simple structure, and can effectively realize nesting without using legs. It is said.

  In order to achieve this object, the present invention takes the following measures.

  That is, the chair of the present invention is a chair that can be nested back and forth by flipping up the seat, and the left and right rearward legs that extend rearward and downward are arranged inside the left and right frontal legs that extend forward and downward. The leg and the forward leg are connected in the width direction so as to cross each other in the middle, and the rear leg and the forward leg are at a fixed angle at least in use.

  That is, when trying to realize the internal / external relationship between the rearward legs and the forward legs without crossing the legs, the connecting structure of the rearward legs and the forward legs becomes special, or twisting of the leg materials is required. If the legs are crossed, it can be easily realized by simply overlapping the legs.

  In addition, the forward leg can be relatively easily rigid by attaching a backrest, seat support collar, etc. to the upper end side of the crossover, but in order to increase the rigidity of the forward leg, connect the appropriate places with strength members. Will be needed. In this case, if the rear-facing leg is placed outside the forward-facing leg, when another chair is approached from the rear during nesting, the connecting member of the rear chair interferes with the front leg of the front chair, etc. The stack pitch is limited. On the other hand, if the rearward legs are arranged inside the forward legs as in the present invention, even if the left and right rearward legs are connected by a strength member, the strength member is attached to the front chair during nesting. Since it can approach without interfering between the left and right forward-facing legs, it is possible to avoid the stack pitch from being limited.

  In order to reduce the load on the seat, the seat is supported on the rotating shaft on the upper end side of the crossing part of the forward leg, and the seat rest is set on the upper end part of the rear leg to maintain the seated posture. It is preferable to configure.

  Based on the above, the legs of the rearward and forward legs are preferably linear in plan view, and between the upper end side and the lower end side of the left and right rearward legs across the crossing part, It is desirable to connect each by a connecting member.

  In addition, for the convenience of nesting, it is preferable that the left and right forward legs are connected above the connecting member that connects the left and right rearward legs.

  In order to simplify the structure and effectively reduce the number of parts so as not to interfere with nesting, the rear lower part of the seat is supported by a support rod that connects the upper ends of the left and right forward legs. It is desirable that a rotation shaft is set in a part of the heel, the upper ends of the left and right rearward legs are connected by a connecting member, and the upper surface of the connecting member is a seat support.

  In this case, in order to effectively avoid the lowering of the lower space necessary for nesting due to the lifting of the seat, the support rods deviate at least upward from the attached regions to the front legs on both sides. It is preferable to lift the rotating shaft.

  In addition to the above, in order to improve nesting convenience, it is preferable to provide a seat-side supported portion protruding from the lower surface of the seat at a position corresponding to the seat receiver on the lower surface of the seat.

  Since the present invention has the configuration described above, it is possible to provide a chair that can reliably support a load even with a simple structure and that can effectively realize nesting without using legs.

The perspective view which shows the use condition of the chair which concerns on one Embodiment of this invention. The front view. FIG. The right side view. The perspective view which shows the state which flipped up the seat of the chair which concerns on the embodiment. The front view. FIG. The right side view. The partial exploded perspective view of the chair. The figure for demonstrating the nesting of the chair.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  The chair A shown in FIGS. 1 and 5 is made of wood, and is configured such that the seat 1 can be flipped up and can be nested by overlapping in the front-rear state.

  More specifically, the chair A has a rear leg 2 extending rearward and lower and a front leg 3 extending frontward and lower connected in the width direction at an intermediate portion, and a seat receiver 2x is attached to an upper end 2b of the rear leg 2. In addition, a rotation shaft m is provided on the upper end 3b side of the forward leg 3 to rotatably support the lower surface 1c on the rear edge 1a side of the seat 1. The back support rod 4 is integrally connected to the upper end 3 b of the forward leg 3, and the back 5 is attached between the left and right back support rods 4, 4.

  As shown in FIGS. 3 and 4, the forward leg 3 has a side view shape that gradually becomes wider from the lower end portion 3 a toward the upper end portion 3 b, and the plan view shape is linear. The rearward leg 2 also has a side view shape that gradually becomes wider from the lower end portion 2a toward the upper end portion 2b, and the plan view shape is linear. Further, the back support rod 4 has a side view shape gradually narrowing from the lower end portion 4a toward the upper end portion 4b, and the plan view shape is linear. The back support rod 4 and the forward-facing leg 3 may be formed by joining members together, or may be formed by cutting out from a member integrally.

  As shown in FIGS. 2 and 5, the left and right rearward legs 2, 2 are connected in a ladder shape by a first connecting member 21 and a second connecting member 22 extending in the width direction. The first connecting member 21 connects the inner surfaces 2c and 2c in the vicinity of the upper end 2b of the left and right rearward legs 2, and the second connecting member 22 sandwiches a connection position J between the rearward legs 2 and the forward legs 3 described later. In this case, the inner surfaces 2c and 2c are connected to each other on the side opposite to the first connecting member 21, and both the plan view and the front view are linear.

  The same wooden squares are used for the forward-facing leg 3, the rear-facing leg 2, the back support rod 4, and the first and second connecting members 21 and 22.

  Then, the rearward leg 2 is positioned on the inner surface 3c side of the forward leg 3 and crossed in an X shape when viewed from the side, and the rearward leg 2 and the forward leg 3 are connected in the width direction by the connecting member 7 while maintaining the crossing angle. It is connected. As shown in FIG. 9A, the connecting member 7 is configured by an L-shaped metal fitting, and the inner surface 2c of the rearward leg 2 is attached to the inner surface 3c of the frontward leg 3 with one piece 71 of the connecting member 7 sandwiched therebetween. The fastening device v1 such as a countersunk screw inserted into the rearward leg 2 and the piece 71 of the connecting member 7 is fastened to the inner surface 3c of the forward leg 3. At the time of attachment, the other piece 72 of the connecting member 7 is kept in contact with the front surface 2d of the rearward leg 2, and a fastening tool v2 such as a countersunk screw inserted through the other piece 72 from the front is attached to the rearward leg 2. It is fastened to the front surface 2d.

  On the other hand, as shown in FIGS. 1 and 5, the left and right forward legs 3 and 3 are connected by a backrest 5 and a seat rotation support portion 6. The backrest 5 is formed by bending the plywood so that the front is concave, and the attached portion 51 a set on the back side of the left and right curved portions 51 extending obliquely forward and the corresponding corners of the back support rod 4. The attachment part 41 formed by chamfering is abutted and a fastening tool v3 such as a dowel is inserted from the front side of the backrest 51 to be fixed to the back support rod 4. As shown in FIGS. 5 and 9B, the seat rotation support portion 6 includes a support rod 61 attached between the inner surfaces 3c and 3c in the vicinity of the upper end portion 3b of the left and right forward legs 3, and this support rod. Rotating member 62 attached rotatably to 61. As shown in FIG. 6, the support rod 61 is located between the left and right attached regions 61a and 61a located on the same axis, and the left and right attached regions 61a and 61a and the center n of the attached region 61a. As shown in FIG. 7, a seat mounting region 61b in which the shaft center m is brought out at a position biased backward by Δ2 as shown in FIG. 7 is formed by plastic deformation of a round bar-shaped steel material. On the other hand, the rotating member 62 has a flat ark-like shape as shown in FIG. 9 and the like, and is an upward substantially semicircular bearing portion composed of ribs or the like that support the left and right portions of the seat mounting region 61b of the support rod 61. 62a and a downward substantially semicircular pressing member 62b that engages the periphery of the bearing portion 62a so as to sandwich the seat mounting region 61b of the support rod 61 between the bearing portions 62a, and the state The fastening member v4 such as a screw inserted from below into the insertion hole 62c of the rotating member 62 is fastened to the lower surface 1c of the seat 1 shown in FIG. At that time, a stopper mechanism is formed between the seat mounting region 61b of the support rod 61 shown in FIG. 9B and the rotating member 62 so that the seat 1 is click-stopped to a predetermined flip-up position using a regulating member 62c. Yes. The stopper mechanism stably temporarily holds the restricting member 62c at a position (one or two places) where the seat 1 is flipped up by an appropriate uneven engagement structure (not shown) between the restricting member 62c and the seat mounting region 61b. The holding state can be released by applying a force exceeding the holding force.

  As a result of the above, the chair A is always in a self-supporting state with the forward leg 3 and the rearward leg 4 maintained at a constant angle both in the use state shown in FIG. 1 and in the raised state of the seat 1 shown in FIG. The upper surface of the first connecting member 21 that connects the upper end portions 2b of the rearward legs 2 is in a horizontal state, and the upper surface is set to the seat receiver 2x.

  Then, the seat 1 comes into contact with the seat receiver 2x on the upper surface of the first connecting member 21 when the seat 1 rotates about the axis m of the attachment region 61b of the support rod 61 shown in FIG. The seat-side supported member 11 is protruded and attached to the position, and the seat 1 is supported at a use position at a predetermined angle in the state shown in FIGS. 2 and 4 in which the seat-side supported member 11 contacts the seat receiver 2x. So that it can receive the load of the seated person.

  Further, by biasing the shaft center m, the rear edge 1a of the seat 1 that has been flipped up as shown in FIG. 6 is lifted to at least the height positions of the left and right attachment regions 61a of the support rod 61, and FIG. As shown, the upper surface 1d of the seat 1 is retracted to a position where it is as close as possible to the front surface 5a of the backrest 5.

  In the state where the seat 1 of the chair A configured as described above is flipped up as shown in FIGS. 5 and 8, when another chair Ab is brought close to the rear of the front chair Af as shown in FIG. The seat receiver 2x (Ab) of the chair Ab passes under the rear edge 1a (Af) of the seat 1 (Af) constituting the front chair Af, and the left and right rearward legs 2 (Ab) constituting the rear chair Ab Passes between the inner surfaces of the left and right forward legs 3 (Af) constituting the front chair Af and approaches the rear legs 2 (Af) of the front chair Af, and at the same time, the left and right forward legs 3 constituting the rear chair Ab. (Ab) enters the outside of the left and right rearward facing legs 2 (Af) constituting the front chair Af. Further, the backrest 5 (Ab) of the rear chair Ab receives the backrest 5 (Af) and the back support rod 4 (Af) of the front chair Af on the concave inside thereof, and constitutes the front chair Af. Nesting is completed at a position where the back surface 5c (Af) of the drooping 5 (Af) is in contact with or close to the lower surface 1c (Ab) of the seat 1 (Ab) constituting the rear chair Ab.

  At this time, as shown in FIG. 2, the outer dimension W2 between the outer surfaces 2d and 2d of the left and right rearward legs 2 is at least a connecting member as compared with the inner dimension W1 between the inner surfaces 3c and 3c of the left and right forward legs 3. 10, the rearward leg 2 (Ab) constituting the rear chair Ab shown in FIG. 10 is located inside the forward leg 3 (Af) constituting the front chair Af. The forward leg 3 (Ab) constituting the rear chair Ab can be smoothly superimposed on the outside of the rear leg 2 (Af) constituting the front chair Af.

  When the chair A is moved, the first connecting member 21 connecting the rearward legs 2 and 2 shown in FIG. 5 and the lower edge 5b of the backrest 5 shown in FIG. It can be easily transported without the need to provide

  As described above, the chair A of the present embodiment is capable of nesting back and forth by raising the seat 1, and the left and right forward legs 3 extending left and right rearward legs 2 extending rearward and downward. The rearward leg 2 and the forward leg 3 are connected in the width direction so as to cross each other in the middle, and the rearward leg 2 and the forward leg 3 form a certain angle at least in use. is there.

  Thus, since the internal / external relationship between the backward leg 2 and the forward leg 3 is realized by crossing the members, a leg structure necessary for nesting can be easily realized by using simple legs. Further, when connecting the appropriate portions with the strength members in order to increase the rigidity of the forward legs 3, if the rear legs 2 are arranged inside the forward legs 3 as in this embodiment, the left and right rear legs 2, 2 Even if the connecting members 21 and 22 are connected to each other, the connecting members 21 and 22 can enter without interfering between the left and right forward legs 3 and 3 of the front chair Af during nesting. It is possible to effectively prevent the pitch from being limited.

  Further, the seat 1 is supported on the rotation axis m on the upper end 3b side of the crossing portion J of the forward-facing leg 3, and the seat receiver 2x is set on the upper end 2b of the rear-facing leg 2 so as to maintain the seated posture. In addition, since the distance between the rotary shaft m and the seat receiver 2x can be increased, it is possible to effectively avoid a large torque arm and a high load acting on the seat receiver 2x.

  Further, the legs of the backward leg 2 and the forward leg 3 are linear in plan view. That is, in this embodiment, since the nesting can be performed by maintaining the internal / external relationship between the backward-facing leg 2 and the forward-facing leg 3, such a simple structure is suitable for the leg material. It will also lead to diversification.

  In particular, the connecting members 21 and 22 connect the upper end 2b side and the lower end 2a side of the left and right rearward facing legs 2 with the crossing portion J in between. That is, in this embodiment, since the structure of the rearward leg 2 does not affect the nesting, the right and left rearward legs 2 and 2 can be connected at an appropriate position in this way to increase the rigidity.

  In this case, since the left and right forward legs 3, 3 are connected above the connecting members 21, 22 that connect the left and right rearward legs 2, 2, when nesting, the left and right rearward legs 2, 3 are connected. It is possible to prevent the connecting members 21 and 22 between the two from interfering with the connecting portions between the left and right forward legs 3 and 3.

  Specifically, the lower side of the rear edge 1a of the seat 1 is supported by a support rod 61 that connects the upper end portions 3b of the left and right forward legs 3, and a rotation axis m is set in a part of the support rod 61. In addition, the upper end portions 2b, 2b of the left and right rearward legs 2 are connected by a connecting member 21, and the upper surface of the connecting member 21 is a seat receiver 2x. Since it also serves as the function of the receiver 2x, it is possible to simplify the structure and effectively reduce the number of parts so as not to disturb the nesting.

  At that time, since the support rod 61 is biased at least upward from the attached region 61a to the forward leg 3 on both sides and lifts the rotary shaft m, the support rod 61 lifts the seat 1 when the seat 1 is flipped up. Along with this, the rear edge 1a of the seat 1 can be lifted upward, and it is possible to effectively avoid narrowing the lower space necessary for nesting.

  Further, a seat-side supported portion 11 that protrudes from the lower surface 1c of the seat 1 is provided at a position corresponding to the seat receiver 2x on the lower surface 1c of the seat 1, so that the position of the seat receiver 2x can be kept low. Therefore, it is possible to easily pass the rear edge 1a of the seat 1 that stands up during nesting.

  Although one embodiment of the present invention has been described above, the specific configuration of each part including the material of the legs and the connecting member is not limited to the illustrated example, and various modifications can be made without departing from the spirit of the present invention. Deformation is possible.

DESCRIPTION OF SYMBOLS 1 ... Seat 1a ... Rear edge 1c ... Lower surface 2 ... Backward leg 2a ... Lower end part 2b ... Upper end part 2x ... Seat receiver 3 ... Forward leg 3b ... Upper end part 11 ... Seat side supported part (seat side supported member)
21 ... 1st connecting member 22 ... 2nd connecting member 61 ... Supporting rod 61a ... Mounted area 61b ... Seat mounting area A ... Chair J ... Crossing part m ... Rotating shaft

Claims (8)

In a chair that can be nesting back and forth by flipping up the seat,
The left and right rearward legs that extend rearward and downward are arranged inside the left and right frontal legs that extend forward and downward,
Connect these rearward legs and forward legs in the width direction so as to cross in the middle,
A chair characterized in that at least the back leg and the forward leg are at a certain angle in use.   The chair according to claim 1, wherein the seat is supported on the rotating shaft on the upper end side of the crossing portion of the forward-facing leg, and a seat support is set on the upper end portion of the rear-facing leg to maintain a seated posture.   The chair according to claim 1 or 2, wherein the legs of the rearward and forward legs are linear in plan view.   The chair according to any one of claims 1 to 3, wherein an upper end portion side and a lower end portion side of the left and right rearward legs are connected by a connecting member with the crossing portion interposed therebetween.   The chair according to claim 4, wherein the left and right forward legs are connected to each other above a connecting member that connects the left and right rearward legs.   The rear lower part of the seat is supported by a support rod that connects the upper end side of the left and right forward legs, and a rotation axis is set on a part of this support rod, and the upper end portions of the left and right rear legs are connected by a connecting member The chair according to any one of claims 2 to 5, wherein the upper surface of the connecting member is a seat.   The chair according to claim 6, wherein the support rod lifts the rotating shaft by biasing the central seat mounting region at least upward from the attached regions to the forward legs on both sides.   The chair according to any one of claims 2 to 7, wherein a seat-side supported portion that protrudes from the lower surface of the seat is provided at a position corresponding to the seat receiver on the lower surface of the seat.

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